Article, 1961, Roland F. Pease Jr. Testimonial of Roland F. Pease Jr. on the blue monochromes seen at the Leo Castelli exhibition, 1961
Document, 1964 Invitation card for the exhibition "Yves Klein Peintures de feu" at the Galerie Schmela, Düsseldorf
Document, 1961 Invitation card for the exhibition "Yves Klein Monochrome und Feuer" at the Museum Haus Lange in Krefeld
Document, 1969 Invitation card for the exhibition "Yves Klein" at the Nouvelle Galerie Lambert Monet, Geneva
Book, 2019, Fausto Gilberti Yves Klein : l'artiste qui voulait tout peindre en bleu (et s'en fichait)